Finding the Secondary Node

Simplyblock, in high-availability mode, creates two connections per logical volume: a primary and a secondary connection.

The secondary connection will be used in case of issues or failures of the primary storage node which owns the logical volume.

For debugging purposes, sometimes it is useful to find out which host is used as the secondary for a specific primary storage node. This can be achieved using the command line tool sbctl by asking for the details of the primary storage node and grepping for the secondary id.

Find secondary for a primary

sbctl storage-node get <NODE_ID> | grep secondary_node_id